refactor: rename cli to node and export render

packages/nitro/src/targets/node/entry.ts

@@ -1,14 +1,16 @@
 // @ts-ignore
 import { render } from '~runtime/server'
+// @ts-ignore
+export { render } from '~runtime/server'
 
-const debug = (label, ...args) => console.debug(`> ${label}:`, ...args)
-
-async function main () {
+async function cli () {
   const url = process.argv[2] || '/'
-  debug('URL', url)
+
+  const debug = (label, ...args) => console.debug(`> ${label}:`, ...args)
 
   const { html, status, headers } = await render(url)
 
+  debug('URL', url)
   debug('Status', status)
   for (const header in headers) {
     debug(header, headers[header])
@@ -17,7 +19,9 @@ async function main () {
   console.log('\n', html)
 }
 
-main().catch((err) => {
-  console.error(err)
-  process.exit(1)
-})
+if (require.main === module) {
+  cli().catch((err) => {
+    console.error(err)
+    process.exit(1)
+  })
+}